Miles e



(Modeh) M. E. HAMILTON. COMBINED LOOK AND LATCH. No. 282,886. Y PatentedAug. 7, 1883.

UNITED STATES PATENT OFFICE.

MILES E. HAMILTON, OF AUEUEE, NEW YORK, ASSIGNOR or ONE-HALF TO GEORGEGREEN, OF SAME PLACE.

COMBINED L'OCK AND LATCH.

SPECIFICATION forming part of Letters Patent No. 282,886, dated August'7, 1883.

' Application filed May 12, 1883. (ModeL) I To all whom it may concern:

Be it known that I, MILEs E. HAMILTON, a citizen of the United States,and a resident of Auburn, in the county of Cayuga and State of New York,have invented certain new and useful Improvements in Door Locks andLatches;

and I do hereby declare that the following is a full, clear, and exactdescription of the invention,which will enable others skilled in the artto which it appertains to make and use the same, reference beinghad tothe accompanying drawings, which form a part of this specification, andin which- Figure 1 is a perspective view of my improved door latch andlock. Fig. 2 is alongitudinal horizontal section of the same. Fig. 3 isa longitudinal vertical section of the same, and Figs. 4 and 5 areperspective detailviews of the latch and stem. Fig. 6 is a perspectiveof the key.

Similar letters of reference indicate corresponding parts in all thefigures.

My invention has relation to door-locks and latches; and it consists inthe improved construction and combination of parts of the same, ashereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates a' cylindricalcasing, divided longitudinally in two halves, the one of which, B, isprovided with a flanged plate, 0, the diametricallyopposite flanges D ofwhich are perforated for the reception of the securingscrews E, whichsecure the lock to the door in its correspondingly-shaped recess, whileboth halves are provided at their other ends with projecting lips F,which are perforated for the reception of a screw, G, by which they aresecured together, and the upper half is provided with a projecting lug,A, fitting into a recess, I

D, in the rear side of the face-plate. The front plate, 0, has a squareor rectangular opening, H, through which the bolt I slides, the innerpart of w the divided casing forming a bearing for the same. Aspiralspring, J, is coiled around the bolt, bearing against a partition, K,some distance inside the plate 0, with one 'end, and bearing with itsother end, which is bent inward, through a transverse hole, L, in thebolt, forcing it forward. The

inner end of the bolt is flat, and has a longitudinal transverse slot,M, through which the stem N of the handle of the lock passes, and theupper and lower sides of the slot are recessed at O, at opposite sides,for the purpose of allowing room for two diametrically-opposite lugs orears, P, which are out off straight at their rear edges and rounded attheir front edges. The rear end' of the bolt is cut off square, and theblunt or square ends of three tumblers, Q, bear against the same,preventing it from'sliding back when they are turned down, the tumblersturning upon a longitudinally-slotted sleeve, R, turning in a transversebore or perforation, S, in the casing,with their inner wider bases. Thecentral tumbler, T, is rigid with the sleeve, and has an aperture orslot, U, in the center of its base, correspond ing to the pin of .thekey, while the other tumblers have short slots or notches V, extendingfrom the central apertures, and correspond ing to the longitudinal slotin the sleeve when they are raised. Three double-bent springs, WV,

are fastened at one end to the bottom of the easing, and bear with theirdownward-bent free ends against the grooved rear edges, Y, of thetumblers, which are cut off perpendicularly, with their lower cornersbeveled, so that the tumblers may turn freely down and back, the springsbearing against the grooved rear edges, Y, and the grooved lower edges,Z, when the tumblers are either in their vertical or horizontalpositions. The key a has a bit, 1), formed by a bent rod, fastened tothe stem, and extending laterally from the collar for a short distance,whereupon it is turned down parallel with the pin a, and it is adaptedto slide in the slot in the sleeve R andproject into the notches V inthe tumblers, turning them.

It will be seen that by only inserting the bent bit of the key into thetwo of the tumblers they may be turned down, leaving the third tumblerstanding upright, preventing the key from opening the look from theother side, thus making the lock proof against being opened from theside opposite to the side at which it was locked, when desired.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United States- IOO 1. The combination, inadoorlatch and lock, [lock-spindle having two diametrically-oppoof thespring-actuated bolt I, the longitudisite lugs, one set to the side ofthe other, and nally-slotted sleeve R, having rigid tumbler havingrounded front and straight rear edges, I 5 T, and loosely-turningtumblers Q, having as and for the purpose shown and set forth. 5 notchesV, the double-bent springs W, and the In testimony that I claim theforegoing as key a, having pin 0 and bit I), as and for the my own Ihave hereunto afiixed my signature purpose shown and set forth. inpresence of twp witnesses.

2. The combination of the sliding bolt hav- T ing a spiral spring woundaround it, forcing it MILES HAMILTOL 10 out, and having a longitudinalslot in its rear \Vitnesses:

flattened end, the sides of which end are 're- ED. J. MOORE, cessed atopposite sides, as described, and a S. J. XVEsTFALL.

